全文获取类型
收费全文 | 150篇 |
免费 | 0篇 |
专业分类
电工技术 | 2篇 |
化学工业 | 3篇 |
机械仪表 | 2篇 |
建筑科学 | 1篇 |
能源动力 | 1篇 |
水利工程 | 2篇 |
石油天然气 | 24篇 |
无线电 | 24篇 |
一般工业技术 | 43篇 |
冶金工业 | 44篇 |
原子能技术 | 4篇 |
出版年
2021年 | 1篇 |
2020年 | 5篇 |
2019年 | 5篇 |
2018年 | 1篇 |
2016年 | 5篇 |
2014年 | 1篇 |
2013年 | 4篇 |
2012年 | 2篇 |
2010年 | 5篇 |
2009年 | 2篇 |
2008年 | 2篇 |
2007年 | 9篇 |
2006年 | 4篇 |
2005年 | 2篇 |
2002年 | 1篇 |
2001年 | 2篇 |
2000年 | 2篇 |
1999年 | 1篇 |
1998年 | 7篇 |
1997年 | 12篇 |
1996年 | 10篇 |
1995年 | 3篇 |
1994年 | 1篇 |
1993年 | 2篇 |
1992年 | 2篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1988年 | 2篇 |
1987年 | 3篇 |
1986年 | 2篇 |
1985年 | 2篇 |
1983年 | 1篇 |
1982年 | 2篇 |
1981年 | 5篇 |
1980年 | 4篇 |
1979年 | 1篇 |
1977年 | 2篇 |
1976年 | 5篇 |
1974年 | 2篇 |
1973年 | 2篇 |
1972年 | 4篇 |
1971年 | 3篇 |
1970年 | 1篇 |
1969年 | 8篇 |
1968年 | 2篇 |
1967年 | 2篇 |
1966年 | 1篇 |
1965年 | 1篇 |
1964年 | 1篇 |
1960年 | 1篇 |
排序方式: 共有150条查询结果,搜索用时 15 毫秒
1.
A. G. Kudashov L. G. Bulusheva A. V. Okotrub O. G. Abrosimov Yu. V. Shubin L. I. Yudanova N. F. Yudanov 《Inorganic Materials》2007,43(9):945-950
Nitrogen-containing carbon nanotubes have been prepared via acetonitrile (CH3CN) pyrolysis at 850°C catalyzed by nanoparticles produced by the thermal decomposition of zinc and nickel bimaleates and their solid solutions. The synthesized samples have been characterized by transmission electron microscopy, x-ray diffraction, and x-ray photoelectron spectroscopy. The results demonstrate that increasing the zinc content of catalyst nanoparticles reduces the yield of carbon nanotubes and increases the nitrogen content of the material. The high synthesis temperature gives rise to zinc vaporization, which influences the growth process, increasing the nanotube diameter, reducing the wall thickness, and lowering the structural perfection of the graphite layers. 相似文献
2.
By methods of DOT hybridization and polymerase chain reaction (PCR) structures similar to Alu repeats were shown in the genome of fish and lamprey. The fact of the presence of such sections in representatives of many orders of fishes, and also our experimental data allow to suppose that Alu-like structures, similar to 3' region of Alu repeats on mammals, have been already formed in these. The evolutionary significance of described structures has been supposed. 相似文献
3.
IuV Plastinina LI Privalova SIu Ter?shin BA Katsnel'son NS Kislitsina 《Canadian Metallurgical Quarterly》1996,(7):16-20
Experiments on white rats proved that the silicotic pulmonary changes slowed with the tails periodically immersed into iodine solution. Those pulmonary changes were due to inhalation of quartzite dust and especially due to intratracheal administration of standardized quartz dust DQ12. Influenced by inhalation of dust containing quartz, the rats demonstrated characteristic alterations in cytologic features of bronchial and alveolar lavage water. The "iodine baths" also declined those alterations, that may prove higher resistance of pulmonary macrophages to cytotoxic effects of quartz. This hypothesis finds a support in experiments with culture of rat peritoneal macrophages. If incubated in a medium with low iodine concentrations and subsequently washed off, the macrophages demonstrate lower incidence of cytotoxic effects due to the next incubation with particles of DQ12. The macrophage's higher resistance against cytotoxic agents is believed to result directly in antisilicotic effect of iodine, so "iodine baths" could be recommended for pathogenetic therapy and medical prophylaxis of silicosis. 相似文献
4.
A. V. Andrianov A. O. Zakhar’in R. Kh. Zhukavin V. N. Shastin D. V. Shengurov N. V. Abrosimov 《Technical Physics Letters》2016,42(10):1031-1033
Terahertz electroluminescence caused by impurity-induced breakdown in lithium-doped silicon crystals is studied. The spectrum of the terahertz emission exhibits lines corresponding to intracenter electronic transitions between excited states of the impurity and sublevels of the ground state of the lithium donor. The spectrum also shows a background signal, which, apparently, is a manifestation of the effects due to heating at electric excitation. 相似文献
5.
E. N. Abrosimov A. S. Semenov A. L. Shestakov 《Optoelectronics, Instrumentation and Data Processing》2010,46(2):156-162
This paper considers the operation algorithm of a hydrostatic level sensor in a liquid of unknown density which is based on
the determination of the moment when the level crosses the pressure sensor and provides increased accuracy of density and
level measurements compared to available methods. The algorithm was synthesized on the basis of the maximum likelihood method.
The algorithm was analyzed and experimental data are given. 相似文献
6.
7.
Yu. V. Pomozov M. G. Sosnin L. I. Khirunenko N. V. Abrosimov W. Schröder 《Semiconductors》2001,35(8):890-894
It is found that two types of centers are formed in Si1?x Gex single crystals as a result of irradiation with fast electrons: divacancies (V 2) characteristic of silicon and the V 2 * centers; the latter are complexes of divacancies V 2 with germanium atoms (V 2Ge). It is shown that an absorption band peaked at about 5560 cm?1 is a superposition of two absorption bands that correspond to the above centers. The V 2 divacancies diffuse during isochronous heat treatment and interact with germanium atoms, thus giving rise to additional V 2 * centers. The latter have a higher thermal stability than the V 2 centers do, and their annealing temperature increases with increasing content of germanium. 相似文献
8.
T. S. Argunova E. I. Belyakova I. V. Grekhov A. G. Zabrodskiĭ L. S. Kostina L. M. Sorokin N. M. Shmidt J. M. Yi J. W. Jung J. H. Je N. V. Abrosimov 《Semiconductors》2007,41(6):679-683
The results of studying the structural and electrical properties of structures produced by the method of direct bonding of Ge x Si1?x and Si wafers are reported. The wafers were cut from the crystals grown by the Czochralski method. Continuity of the interface and the crystal-lattice defects were studied by X-ray methods using synchrotron radiation and by scanning electron microscopy. Measurements of the forward and reverse current-voltage characteristics of the p-Ge x Si1?x /n-Si diodes made it possible to assess the effect of the crystallattice defects on the electrical properties of heterojunctions. Satisfactory electrical parameters suggest that the technology of direct bonding is promising for the fabrication of large-area Ge x Si1?x /Si heterojunctions. 相似文献
9.
A. I. Veinger A. G. Zabrodski T. V. Tisnek S. I. Goloshchapov N. V. Abrosimov 《Semiconductors》2007,41(6):666-672
The electron spin resonance (ESR) at phosphorus dopants in the P-doped Si1−x
Ge
x
alloys (0 < x < 0.057) with the concentration of phosphorus in the range 1015–1016 cm−3 is studied at temperatures from 3 to 30 K. The ESR spectra of the alloys (x > 0) are compared to the ESR spectra of similar silicon samples (x = 0). It is found that, from the smallest Ge content x = 0.008, the ESR spectra contain two additional lines. It is assumed that these lines are due to phosphorus dopants located
in clusters with higher Ge content. It is found that an increase in the Ge content in the alloys up to x = 0.024 yields only an increase in the concentration of such clusters. At x ≥ 0.024, the Ge content increases with x both inside and outside the clusters.
Original Russian Text ? A.I. Veinger, A.G. Zabrodskiĭ, T.V. Tisnek, S.I. Goloshchapov, N.V. Abrosimov, 2007, published in
Fizika i Tekhnika Poluprovodnikov, 2007, Vol. 41, No. 6, pp. 687–693. 相似文献
10.
N. A. Artamonov B. F. Abrosimov M. Z. Maksimenko 《Journal of Engineering Physics and Thermophysics》1987,53(6):1382-1386
The results of experimental studies of the pressure gradient field near the axis are presented, and the change in the pitch of the screw structure of gas flows is determined.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 53, No. 6, pp. 906–911, December, 1987. 相似文献